409 lines
12 KiB
Python
409 lines
12 KiB
Python
# coding=utf-8
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import dateutil.parser
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import logging
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import os
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import re
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import uuid
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from collections import OrderedDict
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from fuzzywuzzy import fuzz
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from django.conf import settings
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try:
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from django.core.urlresolvers import reverse
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except ImportError:
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from django.urls import reverse
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from django.db import models
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from django.template.defaultfilters import slugify
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from django.utils import timezone
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from .managers import LogManager
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class MatchingModel(models.Model):
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name = models.CharField(max_length=128, unique=True)
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slug = models.SlugField(blank=True)
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automatic_classification = models.BooleanField(default=False, help_text='Automatically assign to newly added documents based on current usage in your document collection.')
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class Meta:
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abstract = True
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ordering = ("name",)
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def __str__(self):
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return self.name
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def save(self, *args, **kwargs):
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if not self.slug:
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self.slug = slugify(self.name)
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models.Model.save(self, *args, **kwargs)
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class Correspondent(MatchingModel):
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# This regex is probably more restrictive than it needs to be, but it's
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# better safe than sorry.
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SAFE_REGEX = re.compile(r"^[\w\- ,.']+$")
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class Meta:
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ordering = ("name",)
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class Tag(MatchingModel):
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COLOURS = (
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(1, "#a6cee3"),
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(2, "#1f78b4"),
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(3, "#b2df8a"),
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(4, "#33a02c"),
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(5, "#fb9a99"),
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(6, "#e31a1c"),
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(7, "#fdbf6f"),
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(8, "#ff7f00"),
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(9, "#cab2d6"),
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(10, "#6a3d9a"),
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(11, "#b15928"),
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(12, "#000000"),
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(13, "#cccccc")
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)
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colour = models.PositiveIntegerField(choices=COLOURS, default=1)
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is_inbox_tag = models.BooleanField(
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default=False,
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help_text="Marks this tag as an inbox tag: All newly consumed documents will be tagged with inbox tags.")
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is_archived_tag = models.BooleanField(
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default=False,
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help_text="Marks this tag as an archive tag: All documents tagged with archive tags will never be modified automatically (i.e., modifying tags by matching rules)")
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class DocumentType(MatchingModel):
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pass
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class Document(models.Model):
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TYPE_PDF = "pdf"
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TYPE_PNG = "png"
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TYPE_JPG = "jpg"
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TYPE_GIF = "gif"
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TYPE_TIF = "tiff"
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TYPES = (TYPE_PDF, TYPE_PNG, TYPE_JPG, TYPE_GIF, TYPE_TIF,)
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STORAGE_TYPE_UNENCRYPTED = "unencrypted"
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STORAGE_TYPE_GPG = "gpg"
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STORAGE_TYPES = (
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(STORAGE_TYPE_UNENCRYPTED, "Unencrypted"),
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(STORAGE_TYPE_GPG, "Encrypted with GNU Privacy Guard")
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)
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correspondent = models.ForeignKey(
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Correspondent,
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blank=True,
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null=True,
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related_name="documents",
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on_delete=models.SET_NULL
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)
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title = models.CharField(max_length=128, blank=True, db_index=True)
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document_type = models.ForeignKey(
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DocumentType,
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blank=True,
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null=True,
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related_name="documents",
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on_delete=models.SET_NULL
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)
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content = models.TextField(
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db_index=True,
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blank=True,
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help_text="The raw, text-only data of the document. This field is "
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"primarily used for searching."
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)
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file_type = models.CharField(
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max_length=4,
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editable=False,
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choices=tuple([(t, t.upper()) for t in TYPES])
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)
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tags = models.ManyToManyField(
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Tag, related_name="documents", blank=True)
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checksum = models.CharField(
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max_length=32,
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editable=False,
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unique=True,
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help_text="The checksum of the original document (before it was "
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"encrypted). We use this to prevent duplicate document "
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"imports."
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)
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created = models.DateTimeField(
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default=timezone.now, db_index=True)
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modified = models.DateTimeField(
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auto_now=True, editable=False, db_index=True)
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storage_type = models.CharField(
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max_length=11,
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choices=STORAGE_TYPES,
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default=STORAGE_TYPE_UNENCRYPTED,
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editable=False
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)
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added = models.DateTimeField(
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default=timezone.now, editable=False, db_index=True)
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archive_serial_number = models.IntegerField(
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blank=True,
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null=True,
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unique=True,
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db_index=True,
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help_text="The position of this document in your physical document archive.")
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class Meta:
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ordering = ("correspondent", "title")
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def __str__(self):
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created = self.created.strftime("%Y%m%d%H%M%S")
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if self.correspondent and self.title:
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return "{}: {} - {}".format(
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created, self.correspondent, self.title)
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if self.correspondent or self.title:
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return "{}: {}".format(created, self.correspondent or self.title)
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return str(created)
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@property
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def source_path(self):
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file_name = "{:07}.{}".format(self.pk, self.file_type)
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if self.storage_type == self.STORAGE_TYPE_GPG:
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file_name += ".gpg"
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return os.path.join(
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settings.MEDIA_ROOT,
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"documents",
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"originals",
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file_name
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)
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@property
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def source_file(self):
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return open(self.source_path, "rb")
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@property
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def file_name(self):
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return slugify(str(self)) + "." + self.file_type
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@property
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def download_url(self):
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return reverse("fetch", kwargs={"kind": "doc", "pk": self.pk})
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@property
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def thumbnail_path(self):
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file_name = "{:07}.png".format(self.pk)
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if self.storage_type == self.STORAGE_TYPE_GPG:
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file_name += ".gpg"
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return os.path.join(
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settings.MEDIA_ROOT,
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"documents",
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"thumbnails",
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file_name
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)
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@property
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def thumbnail_file(self):
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return open(self.thumbnail_path, "rb")
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@property
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def thumbnail_url(self):
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return reverse("fetch", kwargs={"kind": "thumb", "pk": self.pk})
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class Log(models.Model):
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LEVELS = (
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(logging.DEBUG, "Debugging"),
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(logging.INFO, "Informational"),
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(logging.WARNING, "Warning"),
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(logging.ERROR, "Error"),
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(logging.CRITICAL, "Critical"),
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)
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group = models.UUIDField(blank=True)
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message = models.TextField()
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level = models.PositiveIntegerField(choices=LEVELS, default=logging.INFO)
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created = models.DateTimeField(auto_now_add=True)
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modified = models.DateTimeField(auto_now=True)
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objects = LogManager()
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class Meta:
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ordering = ("-modified",)
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def __str__(self):
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return self.message
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def save(self, *args, **kwargs):
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"""
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To allow for the case where we don't want to group the message, we
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shouldn't force the caller to specify a one-time group value. However,
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allowing group=None means that the manager can't differentiate the
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different un-grouped messages, so instead we set a random one here.
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"""
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if not self.group:
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self.group = uuid.uuid4()
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models.Model.save(self, *args, **kwargs)
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class FileInfo:
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# This epic regex *almost* worked for our needs, so I'm keeping it here for
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# posterity, in the hopes that we might find a way to make it work one day.
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ALMOST_REGEX = re.compile(
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r"^((?P<date>\d\d\d\d\d\d\d\d\d\d\d\d\d\dZ){separator})?"
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r"((?P<correspondent>{non_separated_word}+){separator})??"
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r"(?P<title>{non_separated_word}+)"
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r"({separator}(?P<tags>[a-z,0-9-]+))?"
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r"\.(?P<extension>[a-zA-Z.-]+)$".format(
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separator=r"\s+-\s+",
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non_separated_word=r"([\w,. ]|([^\s]-))"
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)
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)
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REGEXES = OrderedDict([
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("created-correspondent-title-tags", re.compile(
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r"^(?P<created>\d\d\d\d\d\d\d\d(\d\d\d\d\d\d)?Z) - "
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r"(?P<correspondent>.*) - "
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r"(?P<title>.*) - "
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r"(?P<tags>[a-z0-9\-,]*)"
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r"\.(?P<extension>pdf|jpe?g|png|gif|tiff?)$",
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flags=re.IGNORECASE
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)),
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("created-title-tags", re.compile(
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r"^(?P<created>\d\d\d\d\d\d\d\d(\d\d\d\d\d\d)?Z) - "
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r"(?P<title>.*) - "
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r"(?P<tags>[a-z0-9\-,]*)"
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r"\.(?P<extension>pdf|jpe?g|png|gif|tiff?)$",
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flags=re.IGNORECASE
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)),
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("created-correspondent-title", re.compile(
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r"^(?P<created>\d\d\d\d\d\d\d\d(\d\d\d\d\d\d)?Z) - "
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r"(?P<correspondent>.*) - "
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r"(?P<title>.*)"
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r"\.(?P<extension>pdf|jpe?g|png|gif|tiff?)$",
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flags=re.IGNORECASE
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)),
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("created-title", re.compile(
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r"^(?P<created>\d\d\d\d\d\d\d\d(\d\d\d\d\d\d)?Z) - "
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r"(?P<title>.*)"
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r"\.(?P<extension>pdf|jpe?g|png|gif|tiff?)$",
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flags=re.IGNORECASE
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)),
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("correspondent-title-tags", re.compile(
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r"(?P<correspondent>.*) - "
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r"(?P<title>.*) - "
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r"(?P<tags>[a-z0-9\-,]*)"
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r"\.(?P<extension>pdf|jpe?g|png|gif|tiff?)$",
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flags=re.IGNORECASE
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)),
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("correspondent-title", re.compile(
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r"(?P<correspondent>.*) - "
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r"(?P<title>.*)?"
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r"\.(?P<extension>pdf|jpe?g|png|gif|tiff?)$",
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flags=re.IGNORECASE
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)),
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("title", re.compile(
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r"(?P<title>.*)"
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r"\.(?P<extension>pdf|jpe?g|png|gif|tiff?)$",
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flags=re.IGNORECASE
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))
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])
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def __init__(self, created=None, correspondent=None, title=None, tags=(),
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extension=None):
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self.created = created
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self.title = title
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self.extension = extension
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self.correspondent = correspondent
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self.tags = tags
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@classmethod
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def _get_created(cls, created):
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try:
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return dateutil.parser.parse("{:0<14}Z".format(created[:-1]))
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except ValueError:
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return None
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@classmethod
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def _get_correspondent(cls, name):
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if not name:
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return None
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return Correspondent.objects.get_or_create(name=name, defaults={
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"slug": slugify(name)
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})[0]
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@classmethod
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def _get_title(cls, title):
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return title
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@classmethod
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def _get_tags(cls, tags):
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r = []
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for t in tags.split(","):
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r.append(Tag.objects.get_or_create(
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slug=t.lower(),
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defaults={"name": t}
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)[0])
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return tuple(r)
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@classmethod
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def _get_extension(cls, extension):
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r = extension.lower()
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if r == "jpeg":
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return "jpg"
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if r == "tif":
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return "tiff"
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return r
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@classmethod
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def _mangle_property(cls, properties, name):
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if name in properties:
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properties[name] = getattr(cls, "_get_{}".format(name))(
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properties[name]
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)
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@classmethod
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def from_path(cls, path):
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"""
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We use a crude naming convention to make handling the correspondent,
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title, and tags easier:
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"<date> - <correspondent> - <title> - <tags>.<suffix>"
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"<correspondent> - <title> - <tags>.<suffix>"
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"<correspondent> - <title>.<suffix>"
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"<title>.<suffix>"
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"""
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for regex in cls.REGEXES.values():
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m = regex.match(os.path.basename(path))
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if m:
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properties = m.groupdict()
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cls._mangle_property(properties, "created")
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cls._mangle_property(properties, "correspondent")
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cls._mangle_property(properties, "title")
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cls._mangle_property(properties, "tags")
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cls._mangle_property(properties, "extension")
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return cls(**properties)
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